Analysis of Split-Tooth Stator PM Vernier Machines With Zero-Sequence Current Excitation

Jiang, Tingting; Zhao, Wenxiang; Xu, Liang

doi:10.1109/tie.2022.3161757

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…Significant works on the magnetic gearing effect of the PMVM have been presented in [5]- [8], which reveal that the PMVM exhibits higher output torque than that of the regular PM synchronous machine (PMSM) with the modulation effect of stator teeth. Besides, many novel PMVM topologies have been proposed to further improve output torque, such as consequent pole rotor PMVM [9], double-rotor PMVM [10], double-excitation PMVM [11], and split-tooth PMVM [12], etc.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Novel Modular Stator Axial-Flux Permanent Magnet Vernier Machine With Improved Power Factor

Yang,

Li,

Lin

2023

IEEE Access

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Permanent magnet Vernier machines (PMVMs) have drawn increasing attention in recent years due to the advantage of high torque density. However, the inherent low power factor issue of PMVMs remains a key challenge. In this paper, a novel axial-flux permanent magnet vernier machine (AFPMVM) with modular stator is proposed. Benefiting from the unique separation slot structure, the proposed machine can obtain not only the improved power factor but also the higher electromagnetic torque, and this is explained theoretically by air-gap field modulation theory. A magnetomotive force (MMF)-permeance model is established to predict the air-gap field harmonics modulated by the stator slots. Moreover, by quantifying the contribution of air-gap field harmonics to the torque generation, the working and nonworking harmonic components of the air-gap field in the proposed machine can be determined. Meanwhile, the relationship between electromagnetic torque and power factor of the proposed AFPMVM is revealed from the perspective of the air-gap field harmonics. Then, the power factor of the proposed machine is significantly improved due to the lower non-working harmonic contents of armature reaction field. The analysis results show that the proposed AFPMVM can achieve 4.1% higher electromagnetic torque and 6.9% higher power factor than the existing AFPMVM. Finally, the influences of some key design parameters on electromagnetic torque and power factor of the proposed AFPMVM are analyzed and verified by finite element analysis.INDEX TERMS Axial flux, electromagnetic torque, field modulation, permanent magnet (PM) vernier machine, power factor.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of Novel Modular Stator Axial-Flux Permanent Magnet Vernier Machine With Improved Power Factor

Yang,

Li,

Lin

2023

IEEE Access

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“…For example, ferrite PMs are used to replace rare earth PMs in the PM machines [14]- [17]. Also, switched reluctance machine [18]- [20] and hybrid excitation machine [21]- [24] are widely investigated. While reducing the cost of the machines, it also reduces the electromagnetic performance of the machines, such as torque density.…”

mentioning

confidence: 99%

Reduction of Unipolar Leakage Flux and Torque Ripple in Consequent-pole PM Vernier Machine

Zhao

et al. 2023

Trans. Electr. Mach. Syst.

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This paper proposes a new consequent-pole permanent magnet vernier machine (CPMVM), which can be regarded as a combination of two conventional CPMVM with opposite polarities. Based on the simplified axial magnetic circuit model, it is verified that the proposed CPMVM can reduce the unipolar leakage flux. In order to reduce the torque ripple of machine and improve the output torque of machine, the flux barrier is placed on the rotor of the proposed machine. Then, the parameters of the proposed CPMVM are optimized and determined. Moreover, the electromagnetic performance, including no-load air-gap flux density, average torque and torque ripple, flux linkage, back-electromotive force, cogging torque, average torque, torque ripple, power factor and loss, is compared with conventional surface-mounted permanent magnet vernier machine (SPMVM) and CPMVM. Finally, it is demonstrated that proposed CPMVM with flux barrier can effectively reduce the unipolar leakage flux and greatly reduce the torque ripple of machine. Also, compared with the SPMVM, the proposed CPMVM with flux barrier saves more than 45% of the permanent magnet material without reducing output torque.

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Direct Torque Control of DC-Biased Hybrid Excitation Machine with Adjustable Zero-Sequence Current

Xu,

Zhi,

Jiang

et al. 2023

2023 26th International Conference on Electrical Machines and Systems (ICEMS)

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Analysis of Split-Tooth Stator PM Vernier Machines With Zero-Sequence Current Excitation

Cited by 7 publications

References 20 publications

Design and Analysis of Novel Modular Stator Axial-Flux Permanent Magnet Vernier Machine With Improved Power Factor

Design and Analysis of Novel Modular Stator Axial-Flux Permanent Magnet Vernier Machine With Improved Power Factor

Reduction of Unipolar Leakage Flux and Torque Ripple in Consequent-pole PM Vernier Machine

Direct Torque Control of DC-Biased Hybrid Excitation Machine with Adjustable Zero-Sequence Current

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